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https://github.com/licsber/micropython.git
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14cf91f704
Previously the end of the heap was the start (lowest address) of the stack. With the changes in this commit these addresses are now independent, allowing a board to place the heap and stack in separate locations.
111 lines
2.6 KiB
Plaintext
111 lines
2.6 KiB
Plaintext
/*
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Custom linker script for STM32F769DISC board with external memory-mapped QSPI flash
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Memory layout:
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FLASH_QSPI .text_qspi
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FLASH_APP .isr_vector
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FLASH_APP .text
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FLASH_APP .data
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RAM .data
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RAM .bss
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RAM .heap
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RAM .stack
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*/
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MEMORY
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{
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FLASH_APP (rx) : ORIGIN = 0x08020000, LENGTH = 2016K /* sectors 1-11 3x32K 1*128K 7*256K */
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FLASH_QSPI (rx) : ORIGIN = 0x90000000, LENGTH = 64M /* external QSPI flash in XIP mode */
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DTCM (xrw) : ORIGIN = 0x20000000, LENGTH = 128K /* Used for storage cache */
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RAM (xrw) : ORIGIN = 0x20020000, LENGTH = 384K /* SRAM1 = 368K, SRAM2 = 16K */
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}
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/* Produce a link error if there is not this amount of RAM for these sections */
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_minimum_stack_size = 2K;
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_minimum_heap_size = 16K;
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/* Define the stack. The stack is full descending so begins just above last byte
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of RAM. Note that EABI requires the stack to be 8-byte aligned for a call. */
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_estack = ORIGIN(RAM) + LENGTH(RAM);
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_sstack = _estack - 32K; /* tunable */
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/* RAM extents for the garbage collector */
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_ram_start = ORIGIN(RAM);
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_ram_end = ORIGIN(RAM) + LENGTH(RAM);
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_heap_start = _ebss; /* heap starts just after statically allocated memory */
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_heap_end = _sstack;
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ENTRY(Reset_Handler)
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SECTIONS
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{
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/* Define the code that goes in QSPI flash */
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.text_qspi :
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{
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. = ALIGN(4);
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*extmod/*(.text* .rodata*)
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. = ALIGN(4);
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} >FLASH_QSPI
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/* The startup code goes first into main flash */
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.isr_vector :
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{
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. = ALIGN(4);
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KEEP(*(.isr_vector))
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. = ALIGN(4);
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} >FLASH_APP
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/* The program code and other data goes into flash */
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.text :
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{
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. = ALIGN(4);
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*(.text*)
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*(.rodata*)
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. = ALIGN(4);
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_etext = .;
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} >FLASH_APP
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/* Used by the startup to initialize data */
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_sidata = LOADADDR(.data);
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/* The initialized data section */
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.data :
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{
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. = ALIGN(4);
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_sdata = .;
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*(.data*)
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. = ALIGN(4);
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_edata = .;
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} >RAM AT> FLASH_APP
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/* The uninitialized (zeroed) data section */
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.bss :
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{
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. = ALIGN(4);
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_sbss = .;
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*(.bss*)
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*(COMMON)
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. = ALIGN(4);
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_ebss = .;
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} >RAM
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/* Define the start of the heap, and make sure we have a minimum size */
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.heap :
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{
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. = ALIGN(4);
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. = . + _minimum_heap_size;
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. = ALIGN(4);
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} >RAM
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/* Just checks there is enough RAM for the stack */
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.stack :
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{
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. = ALIGN(4);
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. = . + _minimum_stack_size;
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. = ALIGN(4);
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} >RAM
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}
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